Toshiba seems to be taking the position of developing customized processors that are optimized for MFPs. The benefit is much smaller size, faster processing (measured by quicker FCOT) and lower power consumption.
Many manufacturers use "off the shelf" PC processors due to lower cost and less complicated to develop.
Xerox commonly convinces buyers to include the spec, "must have a minimum of a 1.2 Ghz processor" for their Black only copiers as a "knock-out" feature.
The MFP industry will always be involved in a spec race.
I am sure eCopy Share Scan, Digi Docflow, NSI, and Fabsoft have a good value position for some resellers. I have never had a need to pitch their products except for some niche applications. In fact, we declined to quote these products rather support another product that might be an "orphan" sale.